Improvement in saw-sets



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FRANCIS BATES., OF NILES, MICHIGAN.

Leim Patent No. 78,357, me May 26, ,1868.

,IMPROVEMENT iN sew-sers.

TO ALL WHOM IT 'MAY CONCERN:

Be it known that I, FRANCIS BATES, of Niles, in thc county of Berrien,and State oi' Michigan, have invented certain new and usefulImprovements in Devices for. Setting Saws; and I do hereby declare thatthe following is a. full, clear, ,and exact description thereof',reference being had to thel'accompanying drawings, making part, 'of thisspecification, and to the letters of reference marked thereon, likeletters indicating like parts 4wherever' they occur.

i To enable others skilled in the art to construct and use my invention,I will proceed to describe it.

My invention relates to devices for setting the teeth of saws, andconsists in the construct-ion of a. novel instrument' for setting eachtoot-h inturn, instead of' each alternate tooth, as is done by mostsaw-setting devices.'

Figure 1 is a plan view.

Figure 2 is a. sectional view of a part detached.

Figure 3 is a perspective view oi` a modification of the end of thevlever for catching and setting the teeth.

. I construct a strong open metallic frame, A, having its lowerv endterminate in rigid'jaws, B, parallel with each other, and suilicientlyfar apart to allow the plate of' a saw, F, of any ordinary thickness, topass readily between them, as shown in iig. 1. From the pointA where theupper ends of the jaws B terminate, the sides of the frame A swell out,and have their upper ends connected by t'. cross-bar', C, as showni'n'g. 1. Near the lower ends of these sides, andabove the point wherethe jaws B commence, I place another 4cross-bar, D, as shown in the samefigure. In thecross-bar C, I make a slot, g, as shown in iig. 2, nearlythrough its entire length. Y The cross-bar D, I make slotted in a.similar manner. and in' that part of the bar D onithe front side of the"slot, I make another slot, e, opening` into it, as clearly shown infig'. I Through the slots in the`crossbars C andD, which are in the sameplane, I insert a lever, E, arranged so as to move easily in them, andto be held at any desired height by a screw, v, passing into it throughthe slot e, so, however, as not to interfere with the lateral movementof the lever. 'Ille-lower end of the lever E, I provide with a slot orbite,j`, as shown in iig. 1, vof av suitable size to t upon the teeth ofthe saw, F. 'Ihe upper end ofthe frame A, I provide with two set-screws,a, one on each side of the frame. Thcse'screwsa are adjustable, for thepurpose of limiting the lateral movement ofthe lever E. The jaws B, Iprovide with fourisct-screws, Z1, putting two in each jaw, as shown iniig. 1.

In operating my saw-set, I fasten the plate of theisaw between clamps,if necessary, to hold it in position, and then adjust the screws I so asto allow the set to be moved'along the plate easily, and yet hug itclose enough to prevent its having any lateral movement. Havingdetermined the exact set tobe given to the teeth, I set the screws a inthe side of the frame A, so as to limit thelateral movement oi' thelever E, and arrange the lever E so that the slotf will fairly catchupon .the teeth of the saw. The slotf catches upon one tooth when thelever E is moved over to one side of' the frame, and sets the tooth. Itis then released, and the frame is moved along far enough to allow theslotf to catch upon the next tooth when the lever is moved in theopposite direction, and thus'the process is continueduntil all the teethare seti The'angle given to the teeth is`determined by the extent of thelateral movement of the lever E. I

In order that my device'niay be used to set saws of diii'erentthicknesses, I construct the lever E with a. head, G, pivoted to it, sothat it may revolve. This head is made with four or more angular points,z, and each point is provided with a different-sized slot, so as toaccommodate the teeth' of saws of diii'erent thicknesses,-

as desired. This lever may be readily substituted for the lever E bypivoting the head Gr after the handle of the lever is inserted in theslots in the cross-pieces. I

v The entire device, excepting the set-screws and lever, may be made outof a single-piece of metal by cast ing, and when made in this way, whichis the one most preferred, it is at once strong and durable.

Inthis way I umv able'to make a. very cheap, strong, and durable, aswell as labor-saving device, for setting saws rapidly and accurately.

Having thus described my invention, whatA I claim is A saw-set,consisting of the frame provided with thc jaws B and setlscrews forholding the saw, and having the lever E arranged to operate'therein,substantially as shown and described.

FRANCIS BATES Witnesses QHoLwELL KNOX, W. K. LACEY.'

